Clark Ashton Smith
Clark Ashton Smith is most famous for his association with H.P Lovecraft. Both of them contributed stories to pulp volumes such as Weird Tales, Strange Tales, Astounding Stories, etc. He wrote his own weird fiction but was also likely influenced by Lovecraft in creating additional Cthulu Mythos based stories. He was also a poet, sculptor and an amazing artist of peculiar characters and creatures. Thanks to Luke for the link.
Wolverton is probably best known for his goofy abstracted cartoon faces and bodies that have appeared in magazines, gift cards, tshirts and recently, small statues. But he's also one of the earliest comic artists of bizarre tales. He's made many comics in the horror and science fiction genre. His imaginative creatures and incredible hatch mark drawing style always made him stand out against the rest.
16 Drawings Of The Apocalypse
3rd Gallery (In 3-D)
Downloadable Comic - Powerhouse Pepper